Electric commutator



H. HAAGE ELECTRIC COMMUTATOR Filed Jan- 23 1922 1 a I //l/ J 9 Patented May 6,1924.

1 UNITED STATES PATENT- OFFICE.

HUGO HAAGE, or BERLIN-CHABLOTTENBURfir, GERMANY, AssIGNoR T SIEMENS- SCHUCKERTWERKE GESELLSCHAFT MIT BnsoHRANKTnR HAFTUNG, or SIEMENS- s'rAnT, NEAR BE LIN, GERMANY, A CORPORATION or GERMANY.

ELECTRIC COMMUTATOR.

Application filed. January 23, 1922. Serial No. 531,202.

a To all whom it may concern:

Be it known that I, HUGO HAAGE, a citi-.

zen of the German Empire, residing at Berlin-Charlottenburg, Germany, have invented certain new and useful Improvements in Electric Oommutators, of which the following is a specification.-

In electric machinery, commutators of rather great length act detrimentally on the shaft, on which they are mounted, owing to the expansion" of their segments. Various means have alreadybeen proposed to overcome this drawback.

The present invention relates to such means, which are'of' very simple and cheap ca st n- I According to the invention, the commutator is mounted on its shaft with a comparatively short part of its inner length only,

and 2 are longitudinal sections of two dif mutator ends and said shaft.

while the remainin parts of its inner len h are freely suspen ed in radial direction around said shaft, any deformations of the commutator having thus no action on the shaft. Y I I I In the accompanying drawing, Figs. 1

ferent forms of construction showing how the invention can. be; reduced to practice. Referring to Fig. 1-:-The segments 8 of the commutator a are; provided on their inner. sides with an axially short inward projection v, at which they; are mounted on a tapered portion of the shaft w by means of an intermediary insulation '5, a threaded collar 1) locking the commutator in place by means of a s acing bushing z and a pressure-ring r. lip-rings d serve to .keep the segments in place inradial directions. The ends of the commutator extending beyond portion '0 are freely sus ended around said shaft, an insulation 6 with a metal cover m being rovided. onthe inner sides of said protru ing ends andheld in place by any suitable means, for instance by corrugations as shown, so as to prevent current leakage at said inner sides, 'which might occur through dust accumulating on the free spaces between said freely suspended com- Thus, the segments of the co utator can freely expand in axial and radial directions, without detrimentally acting on the shaft.

Referring to Fig. 2:The commutator (1 comprises here a separate inner sleeve 0, on which the segments are located by means of an insulation 0 and secured by means of a pressure-ring 7c and'a fastening-collar a.

This sleeve is mounted on a tapered portion expansion of said segments and preventing a deformation of the latter when being pressed together in axial direction.

The improved arrangement, besides reventing any detrimental action on the s aft by a deformation of the commutator, has the further advantage that, vice versa, also the shaft can get deformed without thereby disturbing the commutator.

What I claim, is I 1. In combination, a shaft, and a commutator mounted with a comparatively short part of its inner length on said shaft, the remaining parts of the length being freely suspended around said shaft, substantially as and for the purpose set forth.

2. In combination, a shaft, a sleeve of insulation around said shaft and commutator segments mounted with a comparatively short inner part of their length on said insulation, the remaining parts being freely suspended around said shaft.

3. In combination, a shaft, and a commutator insulatedly mounted with a comparatively short part of its length on said shaft, the remaining parts bein freely suspended around said shaft, an an insulation on the inner sides of said freely suspended parts facing said shaft, substantially i as and for the purpose set forth.

metal cover on the inner sides of said freely suspended parts facing said shaft secured thereon by corrugations, substantially as 10 and for the purpose set forth.

In testimony whereof I afi'ix my signature.

HUGO HAAGE. 

